@ARTICLE{6570478, author={Sharma, Sushant and Shi, Yi and Hou, Y. Thomas and Sherali, Hanif D. and Kompella, Sastry}, journal={IEEE Transactions on Mobile Computing}, title={Joint Optimization of Session Grouping and Relay Node Selection for Network-Coded Cooperative Communications}, year={2014}, volume={13}, number={9}, pages={2028-2041}, doi={10.1109/TMC.2013.93}}